使用C#发送POST请求

来源：互联网发布：上海交通事故数据统计编辑：程序博客网时间：2024/05/30 05:30

转：http://blog.csdn.net/yelbosh/article/details/7486636

这里我们要发送一个POST请求，并接受返回的数据：

namespace Yelbosh{class Post{static void main(string[] args){sentence = "你好吧";Encoding encoding = Encoding.GetEncoding("UTF-8");Stream outstream = null;            Stream instream = null;            StreamReader sr = null;                  string url = "http://1.caunion.sinaapp.com/a.php";            HttpWebRequest request = null;            HttpWebResponse response = null;// 准备请求,设置参数            request = WebRequest.Create(url) as HttpWebRequest;            request.Method = "POST";            request.ContentType ="application/x-www-form-urlencoded";                       byte[] data = encoding.GetBytes(url + "&sentence="+sentence);            request.ContentLength = data.Length;            outstream = request.GetRequestStream();            outstream.Write(data, 0, data.Length);            outstream.Flush();            outstream.Close();            //发送请求并获取相应回应数据            response = request.GetResponse() as HttpWebResponse;            //直到request.GetResponse()程序才开始向目标网页发送Post请求            instream = response.GetResponseStream();            sr = new StreamReader(instream, encoding);            //返回结果网页(html)代码            string content = sr.ReadToEnd();}}}

HttpWebRequest在初始化的时候要先根据url进行创建，然后再设置Method和ContentType,然后再将请求的内容写进去，通过GetRequestStream来返回流，再向这个流中写请求内容便可以了。再通过request对象的GetResponse方法返回response对象，最后得到返回的数据流，这是通过GetResponseStream方法返回的，最后从这个流中读出返回的数据便ok了。

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